Land ERC721 (a.k.a Land Plot, Land, or Land NFT) represents land plots in Illuvium: Zero (IZ).
Each token is a piece of land (land plot) on the overall world map in IZ.
Land plot is uniquely identified by its region and coordinates (x, y) within the region.
There can be only one plot with the given coordinates (x, y) in a given region.
Land plot has internal coordinate system used to place the structures (off-chain).
Land plot may contain "sites" with the resources,
a Landmark, increasing the resource production / decreasing resource losses,
or a special type of Landmark - Arena, used to host tournaments.
Sites are positioned on the plot and have their own coordinates (x, y) within a plot.
Number of sites depends on the land plot rarity (tier).
Landmark may exist only in the rare land plots (tier 3 or higher) and resides in the center of the plot.